| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.cassandra.repair.state; |
| |
| import java.util.EnumMap; |
| |
| import org.apache.cassandra.utils.Clock; |
| |
| public abstract class AbstractState<T extends Enum<T>, I> extends AbstractCompletable<I> implements State<T, I> |
| { |
| public static final int INIT = -1; |
| public static final int COMPLETE = -2; |
| |
| private final Class<T> klass; |
| protected final long[] stateTimesNanos; |
| protected int currentState = INIT; |
| |
| public AbstractState(I id, Class<T> klass) |
| { |
| super(id); |
| this.klass = klass; |
| this.stateTimesNanos = new long[klass.getEnumConstants().length]; |
| } |
| |
| @Override |
| public T getStatus() |
| { |
| int current = currentState; |
| if (current < 0) // init or complete |
| return null; |
| return klass.getEnumConstants()[current]; |
| } |
| |
| public int getCurrentState() |
| { |
| return currentState; |
| } |
| |
| @Override |
| public EnumMap<T, Long> getStateTimesMillis() |
| { |
| long[] millis = getStateTimesMillisArray(); |
| EnumMap<T, Long> map = new EnumMap<>(klass); |
| for (int i = 0; i < millis.length; i++) |
| { |
| long ms = millis[i]; |
| if (ms != 0) |
| map.put(klass.getEnumConstants()[i], ms); |
| } |
| return map; |
| } |
| |
| @Override |
| protected void onComplete() |
| { |
| currentState = COMPLETE; |
| } |
| |
| private long[] getStateTimesMillisArray() |
| { |
| long[] millis = new long[stateTimesNanos.length]; |
| for (int i = 0; i < millis.length; i++) |
| { |
| long value = stateTimesNanos[i]; |
| if (value != 0) |
| millis[i] = nanosToMillis(value); |
| } |
| return millis; |
| } |
| |
| protected void updateState(T state) |
| { |
| int currentState = this.currentState; |
| if (currentState >= state.ordinal()) |
| throw new IllegalStateException("State went backwards; current=" + klass.getEnumConstants()[currentState] + ", desired=" + state); |
| long now = Clock.Global.nanoTime(); |
| stateTimesNanos[this.currentState = state.ordinal()] = now; |
| lastUpdatedAtNs = now; |
| } |
| } |